Mr Modi, 63, is used to making long speeches without prepared text and is seen by many as a speaker who can keep his audience engaged.

Sources close to him say a prepared speech or a teleprompter would take away his from his natural flair for connecting with the people.

The PM's idol is former prime minister Atal Behari Vajpayee, the BJP veteran known to be one of the country's best orators. BJP leaders believe Mr Vajpayee's Independence Day speeches missed his sparkling wit as he read from a text.